#!/bin/sh

EXE_PATH="/usr/bin/gateway"
OTA_PATH="/root/gateway.update"
PID_PATH="/var/run/gateway.pid"
OLD_PATH="/root/gateway.old"

start() {
    #1 检查替换 ，如果下载了新的程序 ，则先做替换
	if [ -f $OTA_PATH  ]
	then
		 #1 把当前程序移动重命名为OLD 
         mv -f $EXE_PATH  $OLD_PATH
         #2 把update程序移动命名为EXE 
         mv -f $OTA_PATH $EXE_PATH
         #3 给新程序赋权限 chmod +x 
         chmod +x $EXE_PATH
	fi
    #2 启动程序
	start-stop-daemon -S -q -p  $PID_PATH \
		--exec $EXE_PATH -- daemon
	[ $? = 0 ] && echo "OK" || echo "FAIL"
}
stop() {
	printf "Stopping dropbear sshd: "
	start-stop-daemon -K -q -p $PID_PATH
	[ $? = 0 ] && echo "OK" || echo "FAIL"
}
restart() {
	stop
	start
}

case "$1" in
  start)
  	start
	;;
  stop)
  	stop
	;;
  restart|reload)
  	restart
	;;
  *)
	echo "Usage: $0 {start|stop|restart}"
	exit 1
esac

exit $?